When it's really dark and there are no active weather effects night vision works well. However, I appeared to be stuck for a while there, like the foggy weather effect just stayed, even when it'd supposedly passed. I seem to be back to normal-ish, still very purple, but extremes limited to Dawn/Dusk when facing Easy/West. More worried about my filled-in Base currently...just trying an exit/restart, luckily I'm SP currently. Edit: Phew, that worked - I was getting a panic one there for a moment. This is a very old bug, that seems to have resurfaced... Scoob.